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