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