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