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