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