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