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