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