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)(17,18,22,21)(19,23,27,26)(20,24,29,28)(25,31,32,30)(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)(17,19)(18,23)(20,25)(21,26)(22,27)(24,30)(28,31)(29,32) involution — undirected(17,20)(18,24)(19,25)(21,28)(22,29)(23,30)(26,31)(27,32)(33,35,37,43)(34,38,39,47)(36,45,46,42)(40,48,44,41)(3,10)(6,15)(9,16)(11,13)(17,21,22,18)(19,26,27,23)(20,28,29,24)(25,31,32,30)(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.