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