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