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