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