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)(33,34)(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)(20,31,34,41,32,42,33,26)(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)(18,25)(20,29)(21,30)(22,28)(23,35)(24,37)(26,39)(27,40)(31,44)(32,43)(33,45)(34,46)(36,38)(41,48)(42,47)(11,16)(13,15)(17,20,22,32)(18,26,27,41)(19,29,28,43)(21,34,24,33)(23,31,36,42)(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)(20,32)(25,40)(26,41)(30,37)(31,42)(33,34)(35,38)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.