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