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