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)(11,15)(12,16)(13,14)(17,18)(19,31)(20,37)(21,27)(22,30)(23,29)(24,28)(25,34)(26,33)(32,42)(35,43)(36,44)(38,45)(39,46)(40,48)(41,47) involution — undirected(1,3,5,4)(2,6,8,7)(9,10)(11,16)(12,15)(13,14)(17,19,22,34,24,36,23,35)(18,25,29,31,28,43,30,44)(20,21,39,40,38,32,33,41)(26,27,45,47,46,42,37,48)(1,3,5,4)(2,7,8,6)(10,14)(15,16)(17,20,23,33,24,38,22,39)(18,26,30,37,28,46,29,45)(19,32,35,40,36,21,34,41)(25,42,44,47,43,27,31,48)(9,11,13,12)(10,15,14,16)(17,21,24,32)(18,27,28,42)(19,33,36,39)(20,35,38,34)(22,40,23,41)(25,37,43,45)(26,44,46,31)(29,47,30,48)(1,4,5,3)(2,6,8,7)(9,12,13,11)(10,15,14,16)(18,28)(20,38)(21,32)(25,43)(29,30)(31,44)(33,39)(40,41)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.