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