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