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