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