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