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