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