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