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