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