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