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