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