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