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