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