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