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