One vertex per element, one color per generator, with an edge from x to x·s.
(3,9)(7,14)(10,12)(15,16)(17,18)(19,24)(20,29)(21,26)(22,30)(23,25)(27,31)(28,32)(33,34)(35,37)(36,44)(38,39)(40,42)(41,46)(43,47)(45,48) involution — undirected(1,2)(3,7)(4,11)(5,6)(8,13)(9,14)(10,16)(12,15)(17,19,23,27)(18,24,25,31)(20,26,30,32)(21,22,28,29)(34,39)(35,42)(41,44)(43,48)(2,6)(7,14)(8,11)(15,16)(18,25)(19,27)(22,29)(26,32)(33,35,38,42)(34,40,39,37)(36,43,46,48)(41,47,44,45)(1,3)(2,7)(4,12)(5,9)(6,14)(8,16)(10,13)(11,15)(17,20)(18,22)(19,26)(21,31)(23,30)(24,28)(25,29)(27,32)(33,36)(34,41)(35,43)(37,45)(38,46)(39,44)(40,47)(42,48) involution — undirected(1,4)(2,8)(3,10)(5,13)(6,11)(7,15)(9,12)(14,16)(17,21,23,28)(18,26,25,32)(19,22,27,29)(20,24,30,31)(33,34)(35,40)(36,41)(37,42)(38,39)(43,47)(44,46)(45,48)(1,2)(3,7)(4,8)(5,6)(9,14)(10,15)(11,13)(12,16)(17,22)(18,20)(19,28)(21,27)(23,29)(24,26)(25,30)(31,32)(33,37,38,40)(34,42,39,35)(36,45,46,47)(41,48,44,43)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.