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