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