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