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