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