One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,6)(5,9)(8,12)(10,14)(11,13)(15,16)(22,28)(29,32)(33,34,37,39)(35,41,42,48)(36,44,45,40)(38,46,47,43)(2,6)(4,12)(7,13)(8,9)(11,16)(14,15)(17,18)(19,22)(20,23)(21,24)(25,29)(26,28)(27,30)(31,32)(36,45)(40,44)(41,48)(43,46) involution — undirected(1,3,5,10)(2,7,9,14)(4,11,12,16)(6,13,8,15)(17,19)(18,22)(20,25)(21,26)(23,29)(24,28)(27,31)(30,32)(33,35)(34,38)(36,46)(37,42)(39,47)(40,48)(41,44)(43,45)(3,10)(7,14)(11,16)(13,15)(17,20,21,27)(18,23,24,30)(19,25,26,31)(22,29,28,32)(34,39)(38,47)(40,44)(41,48)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.