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)(17,18,20,25,21,24,28,23)(19,22,27,30,26,31,32,29)(33,34)(35,38)(36,40)(37,39)(41,45)(42,47)(43,46)(44,48)(1,3,5,11)(2,6,8,9)(4,10,12,16)(7,13,14,15)(17,19,21,26)(18,22,24,31)(20,27,28,32)(23,29,25,30)(33,35,36,42,37,43,44,41)(34,38,40,47,39,46,48,45)(4,12)(7,14)(10,16)(13,15)(18,23)(20,28)(22,29)(24,25)(27,32)(30,31)(35,41)(36,44)(38,45)(40,48)(42,43)(46,47) involution — undirected(1,4,5,12)(2,7,8,14)(3,10,11,16)(6,13,9,15)(18,24)(19,26)(23,25)(27,32)(34,39)(38,46)(40,48)(45,47)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.