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