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