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