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