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