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