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