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