One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,11)(5,6)(8,12)(9,13)(10,16)(14,15)(17,18)(19,24)(20,29)(21,26)(22,30)(23,25)(27,32)(28,31)(33,34,38,44)(35,42,46,39)(36,41,47,40)(37,45,48,43)(3,9)(7,13)(10,15)(14,16)(17,19)(18,24)(20,21)(22,28)(23,27)(25,32)(26,29)(30,31)(33,35)(34,39)(36,45)(37,41)(38,46)(40,48)(42,44)(43,47) involution — undirected(2,6)(7,13)(8,11)(14,16)(18,25)(19,27)(20,30)(26,28)(33,36,38,47)(34,40,44,41)(35,45,46,43)(37,39,48,42)(1,2)(3,7)(4,8)(5,6)(9,13)(10,14)(11,12)(15,16)(17,20)(18,22)(19,21)(23,30)(24,28)(25,29)(26,32)(27,31)(33,36)(34,41)(35,45)(37,39)(38,47)(40,44)(42,48)(43,46) involution — undirected(1,3)(2,7)(4,10)(5,9)(6,13)(8,14)(11,16)(12,15)(17,21)(18,26)(19,20)(22,32)(23,31)(24,29)(25,28)(27,30)(33,35)(34,42)(36,45)(37,40)(38,46)(39,44)(41,48)(43,47) involution — undirected(1,4)(2,8)(3,10)(5,12)(6,11)(7,14)(9,15)(13,16)(17,22)(18,20)(19,28)(21,24)(23,29)(25,30)(26,27)(31,32)(33,37,38,48)(34,43,44,45)(35,41,46,40)(36,39,47,42)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.