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