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