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