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