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