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