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