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