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