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