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