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