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