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