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