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