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