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