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