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