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