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