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