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)(13,14,16,18)(15,19,20,17)(21,22)(23,24)(25,29)(26,27)(28,31)(30,32)(33,36)(34,35)(5,6,10,9)(7,12,8,11)(13,14)(15,17)(16,18)(19,20)(22,27)(24,31)(29,35)(32,36)(5,7,10,8)(6,11,9,12)(13,14)(15,19)(16,18)(17,20)(21,23,26,28)(22,24,27,31)(25,33,34,30)(29,36,35,32)(1,2,3,4)(5,8,10,7)(6,11,9,12)(21,24)(22,28)(23,27)(25,32)(26,31)(29,33)(30,35)(34,36)(5,9,10,6)(7,11,8,12)(13,15)(14,17)(16,20)(18,19)(21,25)(22,29)(23,30)(24,32)(26,34)(27,35)(28,33)(31,36)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.