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