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