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