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