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