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