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