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