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