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