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