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