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