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