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