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