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