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