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