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