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