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