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