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