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