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