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