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