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