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