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