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