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