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