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