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