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