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