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