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