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