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