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