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