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