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