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