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