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