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