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