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