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