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