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