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