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