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