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