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)(17,18,22,24)(19,23,26,20)(21,25,30,31)(27,29,32,28)(33,34,39,38)(35,40,42,37)(36,41,45,46)(43,47,48,44)(1,2)(3,6)(4,7)(5,8)(9,13)(10,14)(11,12)(15,16)(17,19)(18,23)(20,24)(21,27)(22,26)(25,29)(28,31)(30,32)(33,35,39,42)(34,40,38,37)(36,43,45,48)(41,47,46,44)(3,9)(6,13)(10,15)(14,16)(18,24)(19,26)(25,31)(27,32)(35,42)(37,40)(43,48)(44,47) involution — undirected(1,2)(3,6)(4,11)(5,8)(7,12)(9,13)(10,16)(14,15)(17,20)(18,19)(21,29)(22,23)(24,26)(25,32)(27,31)(28,30)(33,36)(34,41)(35,43)(37,44)(38,46)(39,45)(40,47)(42,48) involution — undirected(1,3,5,9)(2,6,8,13)(4,10,12,15)(7,14,11,16)(17,19)(18,20)(21,27)(22,26)(23,24)(25,28)(29,31)(30,32)(33,37)(34,35)(36,44)(38,42)(39,40)(41,43)(45,47)(46,48)(1,4,5,12)(2,7,8,11)(3,10,9,15)(6,14,13,16)(17,21)(18,25)(19,27)(20,28)(22,30)(23,29)(24,31)(26,32)(33,38,39,34)(35,37,42,40)(36,41,45,46)(43,47,48,44)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.