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