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