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