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