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