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