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