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