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