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