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)(21,22,26,29)(23,30,28,25)(24,27,32,34)(31,36,35,33)(1,2)(3,4)(5,7,9,15)(6,10,11,13)(8,16,17,14)(12,20,19,18)(24,32)(27,34)(31,35)(33,36)(2,4)(21,23,25,22,26,28,30,29)(24,31,33,27,32,35,36,34)(6,11)(10,13)(12,19)(18,20)(21,24)(22,27)(23,31)(25,33)(26,32)(28,35)(29,34)(30,36) involution — undirected(2,4)(5,8,9,17)(6,12,11,19)(7,14,15,16)(10,18,13,20)(24,32)(27,34)(31,35)(33,36)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.