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