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