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)(21,22,25,29)(23,30,26,27)(24,32,33,35)(28,31,36,34)(1,2)(3,4)(5,7,10,16)(6,12,8,17)(9,19,11,15)(13,20,18,14)(21,23,25,26)(22,27,29,30)(24,31,33,34)(28,35,36,32)(2,4)(22,27)(23,26)(28,35)(29,30)(31,34)(32,36) involution — undirected(5,8,10,6)(7,14,16,20)(9,13,11,18)(12,19,17,15)(21,24,25,33)(22,28,29,36)(23,31,26,34)(27,35,30,32)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.