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