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