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