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)(17,18,23,27,22,28,21,38)(19,29,33,46,32,24,31,42)(20,34,36,44,37,26,39,25)(30,41,47,40,35,45,48,43)(1,2,4,5)(3,6,7,8)(9,10)(11,15)(12,14)(13,16)(17,19,22,32)(18,24,28,29)(20,35,37,30)(21,31,23,33)(25,43,44,40)(26,45,34,41)(27,42,38,46)(36,48,39,47)(9,11)(10,13)(12,16)(14,15)(17,20,22,37)(18,25,28,44)(19,30,32,35)(21,36,23,39)(24,40,29,43)(26,38,34,27)(31,47,33,48)(41,46,45,42)(2,5)(6,8)(11,16)(13,15)(17,20)(18,26)(19,30)(21,39)(22,37)(23,36)(24,41)(25,27)(28,34)(29,45)(31,48)(32,35)(33,47)(38,44)(40,42)(43,46) involution — undirected(1,3,4,7)(2,6,5,8)(10,14)(13,15)(17,21,22,23)(18,27,28,38)(19,31,32,33)(20,36,37,39)(24,42,29,46)(25,26,44,34)(30,47,35,48)(40,41,43,45)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.