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